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What sort of wood was it made out of that those random shattered planks were heavy enough to sink?

Also, I'm curious how they got such a bright, colorful wide-angle photo under 250 feet of water. Special camera? Ginormous lights? I think there's places where the water is really just that clear, but if this was one of those, surely it wouldn't have taken so long to find...

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There is a lot of wood that doesn't float, I guess the options were to put dense wood and less ballast or wood that floats and more ballast.

I think it's oak and is just saturated with water though.

Here is the "global wood density database" (an excel file): http://datadryad.org/repo/handle/10255/dryad.235 (http://datadryad.org/bitstream/handle/10255/dryad.235/Global...)

http://blog.mischel.com/2012/10/21/woods-that-sink/

The photograph is likely heavily photoshopped, the caption says it's a "composite photograph".

The title of the photo says "composite photograph", perhaps several close up photos were stitched together?

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